Advanced
Airborne Solutions
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Looking for
an advanced magnetometer / gradiometer that will give you the
edge over your competition or your upcoming airborne projects?
Now is the time to look to GEM with its extensive line of
airborne solutions.
Solutions are
based on the innovative optically pumped Potassium technology
which provides unique benefits for your next field program. |
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And Now for Something Completely Different ...
GEM offers a unique approach to
airborne magnetometer technologies -- the optically pumped Potassium instrument
-- as a proven solution that delivers a variety of benefits to
operators of airborne geophysical surveys.
Professionals can choose from a) individual magnetometer sensors mounted
on fixed-wing (including Unmanned Airborne Vehicles (UAVs)) or
helicopter platforms, b) the innovative Tridirectional gradiometer
array, or c) base stations for recording data for magnetic diurnal
corrections.
With
such a large family of magnetometer systems available, it can be
difficult to make a choice. We’d like to help by providing you with a
three-step process you can use to make an informed decision. Simply
follow the steps below:
Step 1: Select
By Your Application
The first step to evaluating an airborne magnetometer / gradiometer for
purchase is to be certain
the unit you choose will be best suited to your particular needs.
a) I’m primarily interested in high sensitivity airborne surveys on
either fixed-wing or helicopter-based platforms
If your interest is a), the
GSMP-30A optically
pumped Potassium system is your most logical choice.
b) I’m primarily interested in high sensitivity, 1 to 4 sensor surveys on a
helicopter platform
NEW:
Complete
Airborne Systems are Available:
√
Bird
√
Radar Altimeter
√
GPS (20 Hz)
√
Data Acquisition
View
the PDF Brochure
If your interest is in 4 sensor systems the
Tridirectional
system is your most logical choice.
c) I’m primarily interested in repeatable, accurate base station
readings
If your interest is c), the
Overhauser “Base”
system is your most logical choice.
Step 2: Discover More About Your Choice
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The second step to making a wise decision is to get some background
information that summarizes the key points you need to know about your
choice of magnetometer.
While you’re here, you can also download product and technical
information. If you have any questions, please call us at
+1-905-764-8008.
a) GSMP-30A Magnetometer / Gradiometer
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The GSMP-30A airborne
magnetometer / gradiometer is a very high sensitivity system comprising
a sensor head, connecting cables and pre-amplifier electronics module.
The system delivers many advantages for surveying, including:
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Highest sensitivity
in a commercial airborne magnetometer (0.0001 nT / ÖHz RMS) for detection
of even the most subtle targets
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Sampling rates of
up to 100 Hz for maximum survey density
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Robust sensors for
maximum survey "uptime" and productivity
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Highest absolute
accuracy and minimum heading error for effortless work with
multi-sensor gradiometers
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Helicopter or
fixed-wing configurations, including compensation, for implementation
of optimal, minimum-noise arrays
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Multi-sensor
gradient configurations, including GEM's novel Tridirectional bird for
acquisition of along-track, across-track, and vertical gradients
For more
information, please refer to the following resources:
b)
Tridirectional Magnetometer / Gradiometer
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The
Tri-Directional Helicopter Gradiometer was the first 4 sensor
gradiometer developed in the world. Since its inception in the
mid-1980’s, the system has been outfitted with optically pumped
Potassium sensors and has evolved into a reliable platform for a variety
of applications.
This
special gradiometer is a magnetic measuring system deployed at 30m below
the helicopter. It consists of a three-armed towed bird configured with
4 sensors for calculation of Tri-Directional magnetic gradients. A
special configuration of sensors is used to achieve vertical gradient
spacing of 3m, and horizontal across and along track gradient
separations of 3.46 and 3.76, respectively.
The
sensors measure three “true” gradients based on simultaneous
measurements from each of 4 sensors. Additional components include GPS
(<1.5m or higher resolution) for accurate positioning of the bird during
flight.
Data
capture is either to the GSMP-30A acquisition console or a 3rd
party unit. For 3rd party units, the system has an easy
interfacing capability so that multi-method surveys can be flown. An
example is the interfacing of magnetic gradiometer systems with
radiometrics for gold or uranium exploration. Other combinations can
also be achieved.
Key benefits /
advantages of the system include:
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Cost effective
installation via an integrated set of acquisition components
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Easy operation
using GEM's proven GSMP-30A acquisition console
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Elimination of
costly data acquisition systems with GSMP-30A console
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Reliable
acquisition of high resolution data via the most sensitive commercial
airborne magnetometer / gradiometer on the market
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Accurate
positioning of survey measurement locations with the system's
integrated radar altimeter and GPS data
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Rapid downloading
of results via high-speed RS-232 connection
Note that the
system can also be interfaced to 3rd party acquisition systems. Please
contact GEM directly to enquire about this type of solution.
For more
information, please refer to the following resources:
c) Overhauser “Base”
Magnetometer
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A base magnetometer is a high sensitivity system capable of acquiring
data at a regular interval throughout the day. Depending on the sampling
requirements, it can be either a “Walking” / Fast sampling unit (up to 5
Hz) or a Standard sampling unit (up to 0.33 Hz). Key features are
related to data quality, cost control and productivity as follows:
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Three Base station
programming modes are available for maximum productivity. These
include daily (define working hours and minutes each day); flexible
(up to 30 on / off periods) and immediate start.
Using either daily or
flexible modes means that the operator is not required to return to
the base station each day; data can be acquired with maximum
efficiency and stored in high volume memory.
For more
information, please refer to the following resources:
Step 3: Get A
Quick Quotation
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The final step to improved magnetometer / gradiometer performance is to
contact GEM Systems for a quotation.
We’ll spend some time discussing your particular application and
recommend the solution that optimizes price and performance.
You can relax knowing all GEM Systems products are backed by the
strongest warranty in the business.
For the fastest
service, please call one of our technical representatives at
+1-905-764-8008, or click here to fill in a
short quotation form
and we’ll contact you to discuss your situation.
Technical Papers
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GEM Advanced Magnetometers.
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